What is a disproportion in between Spain’s inhabitant soccer group as well as Catalonia inhabitant team?

I know players identical to Puyol, Xavi as great as Pique dope around for both teams yet whats only the difference? For e.g. can David Villa dope around for Catalonia as great as the small pick players from Spain’s team? I’ve continually amazement that, or have been they both the same team?

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